centos6安装ruby2.4.4

1.安装rvm

       gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3

      curl -sSL https://get.rvm.io | bash -s stable

2.载入RVm环境及支持的包

     source /etc/profile.d/rvm.sh

     rvm requirements

3.利用rvm安装ruby

     sed -i -E 's!https?://cache.ruby-lang.org/pub/ruby!https://ruby.taobao.org/mirrors/ruby!' /usr/local/rvm/config/db       rvm gemset create

     rvm install 2.4.4

    rvm use 2.4.4 --default